The CODATA 2006 value for the Compton wavelength of the electron is .CODATA 2006 value for for the electron from NIST Other particles have different Compton wavelengths.

Significance

Reduced Compton wavelength

When the Compton wavelength is divided by <math></math>, one obtains a smaller or “reduced” Compton wavelength:

<math> frac = frac </math>

The reduced Compton wavelength is a natural representation for mass on the quantum scale, and as such, it appears in many of the fundamental equations of quantum mechanics. The reduced Compton wavelength appears in the relativistic Klein–Gordon equation for a free particle: